Mosquitoes in Randolph Test Positive for West Nile Virus- Risk Level Raised to Moderate

The Randolph Public Health Director Gerard Cody, issued the following statement informing residents that mosquitoes in several communities, including Randolph, have tested positive for West Nile Virus and Randolph's risk level has been raised to moderate. There are NO reported cases of humans testing positive for West Nile Virus in Randolph so far this season, only mosquitoes. To view a PDF version of Director Cody's statement, click here.

West Nile Virus Risk Level Raised to Moderate in Randolph. No WNV positive human cases so far this season. 

The Massachusetts Department of Public Health (MDPH) announced today that the West Nile virus (WNV) disease threat level has been raised to moderate in Randolph and several other communities including Dighton, Rehoboth, Swansea, Lynnfield, Concord, Maynard, Melrose, Stoneham, Wakefield, Winchester, Woburn, Milton, Quincy, Mendon, Northbridge, and Uxbridge. WNV is most commonly transmitted to humans by the bite of a mosquito infected with the virus. While WNV can infect people of all ages, people over the age of fifty (50) are at higher risk for severe infection. 

Culex mosquitoes are the primary vectors of West Nile Virus. The virus is transmitted to humans by the bite of an infected mosquito. The mosquitoes that carry this virus are common throughout the state, and are found in urban as well as more rural areas. While most mosquito species develop in wetlands, Culex mosquitoes prefer to lay their eggs in catchbasins, clogged rain gutters, unused tires, buckets and other water holding containers. Residents have an important role to play in reducing the risk of WNV and protecting themselves and their loved ones by taking a few, common-sense precautions. 

Because of the role of Culex mosquitoes transmitting West Nile Virus, residents can help combat this disease by mosquito proofing their property. Limit the number of places around your home for mosquitoes to develop by either draining or getting rid of items that hold water. Check rain gutters and drains, empty any unused flowerpots and wading pools, and change water in birdbaths frequently. Install or Repair Screens - Some mosquitoes like to come indoors. Keep them outside by having tightly-fitting screens on all of your windows and doors. 

You may also avoid Mosquito bites by following these simple steps.

Be Aware of Peak Mosquito Hours - The hours from dusk to dawn are peak many mosquitoes. Consider re-scheduling outdoor activities that occur during evening or early morning. Otherwise, take extra care to use repellent and protective clothing. 

Clothing can help reduce mosquito bites- Although it may be difficult to do when it's hot, wearing long-sleeves, long pants and socks when outdoors will help keep mosquitoes away from your skin. 

Insect Repellent when you go outdoorsUse a repellent with DEET (N,N-diethyl-m toluamide), permethrin, picaridin (KBR 3023), IR3535 or oil of lemon eucalyptus [p-methane 3, Apply Insect Re 8-diol (PMD)] according to the instructions on the product label. DEET products should not be used on infants under two months of age and should be used in concentrations of 30% or less on older children. Oil of lemon eucalyptus should not be used on children under three years of age. Permethrin products are intended for use on items such as clothing, shoes, bed nets and campingear and should not be applied to skin. 

The Randolph Public Health Department will continue to work with the Massachusetts Department of Public Health, (MDPH) and the Norfolk County Mosquito Control Project to monitor the mosquito populations for WNV. To learn how Norfolk County Mosquito Control can help rid your neighborhood of mosquitoes, please call 781-762-3681. 

Information about WNV and reports of WNV activity in Massachusetts can be found on the MDPH website at Facts sheets on WNV and other mosquito-related materials are available at the Public Health Department, Town Hall, 41 South Main Street, at the bottom of this page and at the above listed website. For more information please contact Gerard Cody, Public Health Director at 781-961-0924 or

Fact Sheet on West Nile Virus

Fèy Enfòmasyon Viris West Nile La (WNV)

Tờ Thông Tin Sừc Khỏe Siêu Vi Miền Tây Sông Nile

马萨诸塞州公共卫生情况简报 西尼罗病毒(WNV)

Folheto Informativo Vírus do Nilo Ocidental (WNV)